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Finding the Fourth Proportional to 492,278.88, 679,571.64 and 288,301.44

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Solution

The fourth proportional to 492,278.88, 679,571.64 and 288,301.44 is: 397,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,278.88 : 679,571.64 = 288,301.44 : x
  2. Step 2: Convert to fraction form
    492,278.88/679,571.64 = 288,301.44/x
  3. Step 3: Cross multiply
    492,278.88x = 679,571.64 × 288,301.44
  4. Step 4: Simplify right side
    492,278.88x = 195,921,482,395.16
  5. Step 5: Solve for x
    x = 195,921,482,395.16/492,278.88
  6. Step 6: Final answer
    x = 397,988.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.